[cfe-commits] [QUESTION] - funky declaration

[Douglas Gregor]

On Jul 26, 2010, at 4:15 PM, John Thompson wrote:

> And also this one (bug 7109):
>  
> class test
> {
> public:
>     test();
>     int member;
> };
> 
> class testStruct
> {
> public:
>  testStruct();
>  test t;
> };
> 
> int i = __builtin_offsetof (testStruct, t);
> 
> >clang -cc1 offsetof1.cpp
> offsetof1.cpp:15:9: warning: offset of on non-POD type 'testStruct'
> int i = __builtin_offsetof (testStruct, t);
>         ^                               ~
> 1 warning generated.
> ---
> Or is it because neither class is strictly POD?
> 
> This still has the warning:
> 
> struct test
> {
> public:
>     test();
>     int member;
> };
> 
> struct testStruct
> {
>  test t;
> };
> 
> int i = __builtin_offsetof (testStruct, t);
> 
> But this does not:
> 
> struct test
> {
>     int member;
> };
> 
> struct testStruct
> {
>  test t;
> };
> 
> int i = __builtin_offsetof (testStruct, t);

Clang appears to be doing the right thing in all cases. offsetof isn't defined on non-POD types.

	- Doug